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Hidalgoite Mineral Data

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General Hidalgoite Information

Help on Chemical  Formula: Chemical Formula: PbAl3(AsO4)(SO4)(OH)6
Help on Composition: Composition: Molecular Weight = 625.17 gm
   Aluminum  12.95 %  Al   24.46 % Al2O3
   Arsenic   11.98 %  As   18.38 % As2O5
   Hydrogen   0.97 %  H     8.64 % H2O
   Lead      33.14 %  Pb   35.70 % PbO
   Sulfur     5.13 %  S    12.81 % SO3
   Oxygen    35.83 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbAl3(AsO4)(SO4)(OH)6
Help on Environment: Environment: Secondary mineral of the oxide zone of polymetallic sulfide deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1953
Help on Locality: Locality: San Pascual mine, nine km northwest of Zimapan, Hidalgo, Mexico. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Hidalgoite + Pronunciation Say HIDALGOITE
 

Hidalgoite Image

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  Hidalgoite

Comments: White to light gray crystalline druze of hidalgoite.
Location: Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Hidalgoite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.41335
Help on Cell Dimensions: Cell Dimensions: a = 7.04, c = 16.99, Z = 3; V = 729.24 Den(Calc)= 4.27
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.981(1), 3.51(0.9), 5.73(0.9),
 

Physical Properties of Hidalgoite

Help on Cleavage: Cleavage: None
Help on Color: Color: Gray white, White, Light green, Light gray.
Help on Density: Density: 3.96
Help on Diaphaneity: Diaphaneity: Translucent to Subopaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white
 

Optical Properties of Hidalgoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.072 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.167,KPDmeas= 0.1801,KC= 0.18
Ncalc = 1.71 - 1.77
Help on Optical Data: Optical Data: Uniaxial (?), b=1.713.
 

Calculated Properties of Hidalgoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.65 gm/cc
note: Specific Gravity of Hidalgoite =3.96 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEHidalgoite = 561.40 barns/electron
U=PEHidalgoite x rElectron Density=2,048.30 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hidalgoite is Not Radioactive
 

Hidalgoite Classification

Help on  Dana Class: Dana Class: 43.04.01.03 (43)Compound Phosphates, etc.
  (43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.04.01)Beudantite Group
 
43.04.01.01 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.02 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m
 
43.04.01.03 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.04 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m
 
43.04.01.05 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.06 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.07 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.08 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.09 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m
 
43.04.01.10 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m
Help on  Strunz Class: Strunz Class: 08.BL.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1
 
08.BL.05 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m
 
08.BL.05 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m
 
08.BL.05 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m
 
08.BL.05 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m
 
08.BL.05 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 

Other Hidalgoite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Hidalgoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Hidalgoite

PbAl3(AsO4)(SO4)(OH)6
Dana No: 43.04.01.03 Strunz No: 08.BL.05
Locality:

 

Notes:

 

 
   
 


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